Hieam h



(No Model.)

H. H. SMITH. OONGENTRATOR FOR ARTIFICIAL LIGHT.

' No. 363,010 Patented May 17, 1887.

UNrrnn STATES HIRAM H. SMITH, OF BROOKLYN, ASSIGNOR TO THE EMPIRE HYDRO CARBON COMPANY, OF NEWV YORK, N. Y.

CONCENTRATOR FOR ARTIFICIAL LIGHTS.

SPECIFICATION forming part of Letters Patent No. 363,010, dated May 17, 1887.

(No model.)

To all whom it may concern.-

Be it known that I, HIRAM H. SMITH, a citizen of the United States, and a resident of the city of Brooklyn, county of Kings, and

State of New York, have invented a certain new and useful Improvement in Concentrators for Artificial Lights; and I do hereby declare the following to be a description of said invention in such full, clear, concise, and exact [0 terms as to enable any skillful person to make and use the same, reference being bad to the accompanying drawings, wherein like letters of reference indicate corresponding parts throughout the several views.

The chief object of my invention is to make a concentrator for artificial lights of improved construction and increased efficiency for concentration and illumination.

In the drawings, Figure 1 shows a central section of this improved concentrator. Fig. 2 shows a bottom plan of the same; and Fig. 3 shows top and bottom plans and side elevation, respectively lettered a, c, and b, of a removable and adaptable elastic cushion to se- 2 cure perfect fitting upon the burner.

The concentrator itself consists of a solid glass center, A, its upper surface plain or slightly concave and its lower surface convex, with radiating solid glass arms, straight or ta- 0 pered, as shown, having plain or slightly-concave upper surfaces and plain or convex lower surfaces, in section of triangular shape and joined by their bases to the center, as shown plainly in Fig. 1. This particular construe- 3 5 tion of the radiating arms presents the most faces, almost facets, practicable to refract and concentrate the light for the best illumination. It is intended to use a reflecting-shade above and about the light, resting upon the arms, as

4,0 indicated by the dotted lines in Fig. 1.

In the center of the concentrator is an opening, which Iprefer to make oblong or square, as shown in plan in Fig. 2, with upward sloping sides, as shown in section in Fig. 1. I provide a corresponding cushion, D, inserted 5 nicely in the opening and made with ahole to fit upon the ordinary gas-burner, or one specially adapted to a particular purpose. I prefer to make this cushion of rubber; but any similar material sufficiently elastic will an- 0 swer.

Fig. 3 shows the details of the construction of the cushion described. The difficulty of fitting the concentrator upon any burner or fixture is thus completely overcome, and no change need be made in the general construction of the concentrator to adapt it to any situation, as whatever change may be necessary can be confined to alteration of the cushion.

What I claim as my invention, and desire to secure by Letters Patent, is

l. A concentrator for artifical light, consisting of a circular plano-convex lens provided with a central opening to fit over and upon the burner, combined about the circumference 6 5 with radiating quadrangular prisms triangular in longitudinal section and attached by the upper edges of their bases, all constructed and cooperating substantially as specified.

2. A concentrator for artificial light, consist- 7o ing of a circular plano-eonvex lens, combined about the circumference with radiating quadrangular prisms triangular in longitudinal section and attached by the upper edges of their bases, the whole provided with an oblong 7 5 or square opening in the center with inward sloping sides, in combination with an elastic cushion removably fitted in the central opening and provided with an opening in its center to fit over and upon the burner, in the manner and for the purpose substantially as specified.

HIRAM H. SMITH.

Vitnesses:

WM. F. PYNE, GEO. WHITFIELD BROWN, Jr. 

